Core-making machine for foundry purposes.



1.1. WARREN.

CORE MAKING MACHINE FOR FOUNDRY PURPOSES.

Patented Jain. 9, 1917.

2 SHEETS-SHEET1.

APPLICATION FILED AUG-9| 1916- m: mmms PETERS ca. FHGTO-LITNO.. wAsmNcraM, n c

J. J. WARREN.

CORE MAKING MACHINE FOR FOUNDRY PURPOSES.

APPUC'ATION FILED AUG.9, 1916- ;l l 15796. Patented Jan. 9, 1917.

2 SHEETS-SHEET 2- J OHN JAMES AB/BEN, OF PRESTON, ENGLAND. I

CORE-MAKING MACHINE FOR FOUNDRY PURPOSES.

Specification of Letters Patent.

Patented Jan. 9, 1917.

Application filed August 9, 1916. Serial No. 113,934.

To all whom it may concern:

Be it known that I, JOHN JAMEs VVAR- REN, a subject of the King of Great Britain, residing at Alpha Cottage, Riverside, Preston, Lancashire, in the country of England, have invented certain new and useful Improvements in Core-Making Machines for Foundry Purposes, of which the following is a specification.

This invention relates to core making machines for foundry purposes, the chief object being to abolish hand ramming and to facilitate the insertion and removal of the vent wire or rod which forms the air vent hole through the center of the core. v

According to this invention two portions of a core box are a'rranged'to receive relative movement in a direction toward and away from each other and operating in conjunction with such portions are two ends which are arranged to occupy any desired distance apart for producing cores of different lengths, a vent or other rod or rods being guided to pass through the core to form a vent or other aperture orv apertures.

In the accompanying drawings :Figure l is a front elevation, Fig. 2 a plan, and Fig. 3 an end view of a core making machine constructed in accordance with this invention.

A, A indicate the two portions of the core box, B, B indicate the two ends and C denotes the vent wire or rod.

In the example shown the lower portion A or half of the core box is secured to a plate a which is hinged at a to a rising and falling table D, such for example as is used in a molding machine. The upper portion A or part of the core box is shown attached to a plate a that is carried by a frame or member o The latter is adjustably mounted. on two arms a that are pivoted ate and is conveniently provided with a rail or handle a toenable the upper portion of the core box tobe moved .into and out of alinement with the lower portion, suitable stops being provided for arresting the movement of the arms a when the upper portion A comes into alinement with the lower por tion A Any other construction may be used which will enable the two portions of the core box to be moved into and out of alinement. In the example shown the upper part of the core box is made open at its ends and the lower part of thecore box is provided with a movable end B and a stationary end B both of which fit into the upper part of the core box when the two parts are brought into contact. The movable end is connected with a screw 1) which from the stationary end, a lock nut or other device being provided if required to retain the nut b in its adjusted position. In the example shown the stationary end is formed with a central hole to receive the vent or other wire or rod C and the latter is guided in such manner as to pass centrally through the core box. For this purpose the wire or rod passes through a guide 0 and is connected at its rear end to a cross head 0 which is slidably mounted on guide rods 0 a handle 0 being conveniently provided'for operatingpurposes. The side edges of the two parts of the core box and of the ends which fit into the upper part of the core box are beveled to constitute cutting edges when the two parts of the core box are placed together.

To utilize the apparatus, the nut o is operated and locked to cause the movable end B to come to rest at a predetermined distance from the stationary end B to produce cores of a required length. The movable end is then looked in this position by tightening up the clamping screw upon the screw Z). The lower core box is now filled with the molding sand from which the core is to be made and after the core stiffening wires have been inserted a light iron frame B see dottedlines Fig. 1, is inserted above and around the lower box and the sand is filled in and swept 0E level with the top of the frame, the frame being made of such a depth that it holds only a small surplus of sand more than is required to produce the core in its finished or compressed condition. The central wire or rod C isnow inserted, the upper part of the core box is brought centrally over the lower part and the latter is raised by hand, foot, air, hydraulic, or other power until the beveled edges of the two boxes meet, whereupon the sand is compressed into the form of a core. After the compressing operation the central Wire or rod is withdrawn by the handle 0*, the

upper half is swung or slid clear and the lower half of the box lowered. The clamp ing screw is then loosened and the movable end drawn clear of the box so that the latter can be tilted on its hinge to deposit the finished core into the hands of the operator, or into a receptacle or conveyer. The lower box is now returned to its normal position and the movable end is re-inserted and clamped in its former position by the screw 6 and the parts are ready for producing another core of the same length as the former one.

By the arrangement described cores of the same length or of diiferent lengths can be made very rapidly and without hand ramming and the beveled edges of the boxes insure a clean cut and a perfectly shaped core where the two parts of the box meet. Cores can be made of different shapes and diameters by providing a number of interchangeable movable ends and vent rods to suit any particular requirement. The principle is adaptable also to the manufacture of certain classes of irregular cores and to simple forms of multiple cores.

The ordinary sand used in foundries for core making in the usual manner is quite suitable for use in this machine.

What I claim as my invention and desire to secure by Letters Patent in the United States is 1. A core making machine comprising a core box formed of relatively movable sections, a stationary end for said sections, a movable end, means for adjustably retaining said movable end in position between said sections, and a movably supported vent rod positioned to be projected longitudinally into said core box.

2. A core making machine comprising a core box formed of relatively movable sections, a stationary end for said sections, a movable end, a carrier member therefor, means foradjustably supporting said carrier member to position the movable end between the said sections, and a movably supported vent rod positioned to be projected longitudinally into said core box.

3. In a core making machine for foundry purposes the combination of a rising and falling table, a lower portion of a core box arranged in hinged relationship thereto, an upper portion of a core box movably supported above the lower portion and arranged to be brought into and out of alinement therewith, a stationary plate closing one end of the lower portion of the core box and'adapted to close the corresponding end of the upper portion of the core box when the two portions are brought into contact, a movable end shaped to fit within the upper and lower portions of the core box,

Copies of this patent may be obtained for means for moving such movable end toward and away from the stationary plate and means for securing it in any adjusted position.

4:- In a core making machine for foundry purposes, the combination of a rising and falling table, a lower portion of a core box arranged in hinged relationship thereto, an upper portion of a core box movably supported above the lower portion and arranged to be brought into and out of alinement therewith, a stationary plate closing one end of the lower portion of the core box and adapted to close the corresponding end of the upper portion of the core box when the two portions are brought into contact, a movable end shaped to fit within the upper and lower portions of the core box, means for moving such movable end toward and away from the stationary plate, means for securing it in any adjusted position, a guide mounted on the rising and falling table, a rod slidable in such guide and arranged to be passed into and out of the core box through an aperture in the stationary plate.

5. In a core making machine for foundry purposes, the combination of a rising and falling table, a plate hinged thereto, a lower portion of a core box secured to such plate the said portion being open at its ends and having beveled side edges, an upper portion of a core box movably supported above the lower portion and arranged to be brought into and out of alinement therewith, the said upper portion having open ends and beveled side edges, a stationary plate closing one end of the lower portion of the core box and having an upper beveled edge adapted to close the corresponding end of the upper portion of the core box when the two portions are brougl'it into contact, a movable plate shaped to fit within the upper and lower portions of the core box and having an upper beveled edge, a screw connected to the movable plate and having a longitudinal interruption, a guide to receive such screw and a set screw in such guide to engage the interruption, a nut mounted upon the screw for regulating the amount of endwise movement of the screw and movable plate, a guide mounted on the rising and falling table outside the stationary plate, and a rod slidable in such guide and arranged to be passed into and out of the core box through an aperture in the stationary plate.

In testimony whereof I attach my signa ture in presence of two witnesses.

JOHN JAMES WARREN.

Witnesses:

DOROTHY ANDERTON BANNISTER, C. BASIL NIXON.

five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

